.btns-line {
    margin-top: 15px;
    text-align: center;
}

.btn-common-1 {
    display: inline-block;
    width: 60px;
    line-height: 30px;
    border-radius: 15px;
    vertical-align: top;
    text-align: center;
    font-size: 14px;
    cursor: pointer;
    color: white;
    background-color: skyblue;
}

.page-content {
    width: 1200px;
    margin: 0 auto;
}

.content-box {
    margin-bottom: 20px;
    font-size: 16px;
    color: #000;
}

.content-box .content-title {
    font-size: 22px;
    line-height: 36px;
    font-weight: bolder;
    counter-reset: subsection;
}

.content-intr-txt {
    text-indent: 2em;
    line-height: 24px;
}

.intr-list {
    padding-left: 2em;
}

.list-item-intr {
    line-height: 24px;
}

.content-box .list-item-intr:before {
    counter-increment: subsection;
    content: counter(subsection) ".";
}